A glow discharge power supply circuit control method, system, device and storage medium
By adjusting the output voltage of the adjustable power supply in real time, the problem of unstable glow discharge was solved, thus achieving circuit protection and improving the glow discharge effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- GREE ELECTRIC APPLIANCE INC OF ZHUHAI
- Filing Date
- 2022-11-28
- Publication Date
- 2026-06-12
Smart Images
Figure CN116208011B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of glow discharge technology, specifically to a glow discharge power supply circuit control method, system, device, and storage medium. Background Technology
[0002] This section is intended to provide background or context for the embodiments set forth in the claims. The description herein is not an admission that it is prior art simply because it is included in this section.
[0003] Air glow discharge is a phenomenon in which an alternating high-voltage current is applied between two electrodes, utilizing the characteristic that the polarity change of air lags behind that of the electrodes, causing air breakdown and resulting in high-frequency discharge. In existing technologies, AC power output is typically used to achieve glow discharge, combined with a transformer to provide high voltage and promote its occurrence. However, glow discharge is unstable, and the glow discharge load fluctuates. If a high voltage output is used to supply the load, it can easily affect the soft-switching state of the circuit, thus impacting the glow discharge effect. Summary of the Invention
[0004] To address the aforementioned technical problems, this invention proposes a glow discharge power supply circuit control method, system, device, and storage medium. This method can adjust the output voltage of the adjustable power supply in a timely manner, reducing the impact and loss on the circuit, thereby protecting the circuit. Furthermore, when the resonance is stable, it maintains the high-voltage peak voltage at a relatively high stable value to stably achieve air glow discharge and improve the glow discharge effect.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention includes four aspects.
[0006] In a first aspect, a method for controlling an air glow discharge power supply circuit is provided, the power supply circuit comprising:
[0007] Adjustable power supply;
[0008] A discharge circuit connected to the output of an adjustable power supply; the discharge circuit is used to convert DC input to AC and boost the voltage to cause air glow discharge in the load;
[0009] The control method includes:
[0010] Obtain the discharge output voltage at the output terminal of the discharge circuit;
[0011] Track the resonant frequency on the discharge circuit;
[0012] Determine whether the resonant frequency is stable;
[0013] If so, adjust the output voltage of the adjustable power supply according to the discharge output voltage so that the high voltage peak of the discharge output voltage is maintained within the set range;
[0014] If not, a step-down adjustment signal is sent to the adjustable power supply to reduce the output voltage of the adjustable power supply.
[0015] In some embodiments, the discharge circuit includes a resonant circuit and a transformer; the resonant circuit includes a first inductor, a second inductor, and a capacitor; the input terminals of the first inductor and the second inductor are both connected to the output terminal of an adjustable voltage; the output terminal of the first inductor is connected to the first terminal of the capacitor, and the output terminal of the first inductor is grounded through a first switching transistor; the output terminal of the second inductor is connected to the second terminal of the capacitor, and the output terminal of the second inductor is grounded through a second switching transistor; the first and second switching transistors operate in a push-pull configuration to generate an alternating current in the capacitor; the primary winding of the transformer is connected in parallel with the capacitor, and the secondary winding is connected to the load.
[0016] In some embodiments, the resonant frequency on the tracking discharge circuit includes:
[0017] Obtain the zero-voltage signal of the transformer primary connected in parallel across the capacitor;
[0018] The resonant frequency is traced based on the zero-voltage signal.
[0019] In some embodiments, the step of tracking the resonant frequency based on the zero-voltage signal includes:
[0020] Set the upper limit of the tracking count and the duration of a single conduction of the first or second switching transistor before the zero voltage signal is generated, and clear the tracking count;
[0021] Switch the first switching transistor to the second switching transistor;
[0022] Track whether the zero voltage signal is generated during the specified duration;
[0023] If not, increment the duration by a set unit of time and update, and increment the tracking count;
[0024] Switch the first switch transistor to the second switch transistor.
[0025] In some embodiments, if the zero-voltage signal is generated within the tracking duration, the first switch and the second switch are switched, the time when the zero-voltage signal is generated is updated to the new duration, and the tracking count is cleared to zero.
[0026] In some embodiments, determining whether the resonant frequency is stable includes:
[0027] Determine whether the tracking count has reached its upper limit;
[0028] If not, the process loops back to step 2, tracking whether the zero-voltage signal is generated within the specified duration.
[0029] If so, then the resonant frequency is determined to be unstable.
[0030] In some embodiments, adjusting the output voltage of the adjustable power supply according to the discharge output voltage to maintain the high voltage peak of the discharge output voltage within a set range includes:
[0031] The magnitude of the high voltage peak is determined based on the discharge output voltage.
[0032] Determine if the high-voltage peak value deviates from the set range;
[0033] If the voltage deviates, adjust the output voltage of the adjustable power supply to keep the high voltage peak of the discharge output voltage within the set range.
[0034] Secondly, a power supply system for air glow discharge is provided, comprising:
[0035] The power supply circuit includes an adjustable voltage power supply and a discharge circuit connected to the output terminal of the adjustable voltage power supply; the discharge circuit is used to convert DC input into AC and boost the voltage to cause air glow discharge in the load.
[0036] A control circuit connected to a power supply circuit, the control circuit comprising:
[0037] The acquisition circuit connected to the discharge circuit is used to detect the output voltage of the discharge circuit and the resonant frequency of the circuit.
[0038] The controller is connected to the input terminal of the acquisition circuit, and the output terminal of the controller is connected to the adjustable voltage power supply to execute the power circuit control method described above.
[0039] Thirdly, a power circuit control device for air glow discharge is provided, characterized in that it includes a memory and a processor, wherein the memory stores a computer program, which, when executed by the processor, performs the power circuit control method as described above.
[0040] Fourthly, a computer-readable storage medium is provided, wherein a processor-executable program is stored, which, when executed by the processor, is used to perform the control method as described above.
[0041] Compared with the prior art, one or more embodiments of the above solutions may have the following advantages or beneficial effects:
[0042] This application provides a method, system, device, and storage medium for controlling an air glow discharge power supply circuit. The power supply circuit control method acquires the discharge output voltage at the output terminal of the discharge circuit; tracks the resonant frequency on the discharge circuit; determines whether the resonant frequency is stable; if stable, adjusts the output voltage of the adjustable power supply according to the discharge output voltage to maintain the high-voltage peak value of the discharge output voltage within a set range; if not stable, sends a step-down adjustment signal to the adjustable power supply to reduce its output voltage. This power supply circuit control method can adjust the output voltage of the adjustable power supply in a timely manner, thereby reducing the impact and losses on the circuit and protecting it. Furthermore, when the resonance is stable, the peak voltage is obtained by acquiring the discharge output voltage of the transformer, thereby adjusting the output voltage of the adjustable power supply to maintain the peak voltage at a relatively high and stable value, thus stably achieving air glow discharge and improving the glow discharge effect. Attached Figure Description
[0043] The present application will be described in more detail below based on embodiments and with reference to the accompanying drawings;
[0044] Figure 1 This is a schematic diagram showing the connection relationship between the power supply circuit, control circuit, and acquisition circuit in an embodiment of the present invention;
[0045] Figure 2 This is a flowchart illustrating the air glow discharge power supply circuit control method in an embodiment of the present invention.
[0046] Figure 3 This is a schematic flowchart of the air glow discharge power supply circuit control method in another embodiment of the present invention;
[0047] Figure 4 In the embodiments of the present invention, corresponding to Figure 3 An exemplary flowchart of step S3 shown;
[0048] Figure 5 In the embodiments of the present invention, corresponding to Figure 4 The steps S32 shown are Figure 3 An exemplary flowchart of step S4;
[0049] Figure 6 In the embodiments of the present invention, corresponding to Figure 4 A schematic diagram of the voltage curve at matching point A or matching point B in step S32 shown.
[0050] Figure 7 In the embodiments of the present invention, corresponding to Figure 3 An exemplary flowchart of step S5 shown;
[0051] Figure 8This is a schematic block diagram of a power supply circuit control device for air glow discharge provided in an embodiment of the present invention;
[0052] Figure 9 This is a schematic block diagram of a computer-readable storage medium provided in an embodiment of the present invention.
[0053] In the accompanying drawings, the same parts are referred to by the same reference numerals, and the drawings are not drawn to scale. Detailed Implementation
[0054] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.
[0055] In existing technologies, glow discharge is typically achieved using AC power output, combined with a resonant circuit and a transformer to provide high voltage and promote glow discharge. However, glow discharge is unstable, and the glow discharge load fluctuates. If a high voltage output is provided to the load, it can easily affect the soft-switching state of the circuit, thereby affecting the glow discharge effect.
[0056] This disclosure provides at least one embodiment of a method for controlling an air glow discharge power supply circuit, applied to a power supply circuit for an air glow discharge load, such as... Figure 1 As shown, the power supply circuit includes: an adjustable voltage power supply; and a discharge circuit connected to the output terminal of the adjustable voltage power supply. The discharge circuit is used to convert the DC input into AC and boost the voltage to induce an air glow discharge in the load. The discharge circuit includes a resonant circuit and a transformer. The primary winding of the transformer is connected in parallel with the capacitor of the resonant circuit, and the secondary winding is connected to the load, so that the voltage is amplified by the transformer and discharged to the load, generating an air glow discharge.
[0057] In some embodiments, the discharge circuit includes a resonant circuit and a transformer; the resonant circuit includes a first inductor, a second inductor, and a capacitor. The first and second inductors are coupled, with their input terminals connected to the output terminal of an adjustable voltage source; the output terminal of the first inductor is connected to the first terminal of the capacitor and grounded through a first switching transistor; the output terminal of the second inductor is connected to the second terminal of the capacitor and grounded through a second switching transistor; the first and second switching transistors operate in a push-pull configuration to generate an alternating current across the capacitor; the primary winding of the transformer is connected in parallel with the capacitor, and the secondary winding is connected to the load.
[0058] In some embodiments, the end of the first switching transistor away from the output terminal of the first inductor is grounded, and the end connected to the output terminal of the first inductor is connected to one end of the capacitor, and this is recorded as point A of the matching network; the end of the second switching transistor away from the output terminal of the second inductor is grounded, and the end connected to the output terminal of the second inductor is connected to one end of the capacitor, and this is recorded as point B of the matching network. The primary winding of the transformer is connected to matching network points A and B respectively, thus achieving parallel connection with the capacitor. When the first switching transistor is turned on to ground and the second switching transistor is turned off, the output voltage of the adjustable power supply charges the first inductor, and the energy of the second inductor enters the transformer and capacitor via matching network point B as current; when the second switching transistor is turned on to ground and the first switching transistor is turned off, the output voltage of the adjustable power supply charges the second inductor, and the energy of the first inductor enters the transformer and capacitor via matching network point A as current. By alternately switching the first and second switching transistors, an alternating current is formed at the primary winding of the transformer. After being stepped up and amplified by the transformer, an alternating high voltage is formed at the secondary winding of the transformer, causing the load to produce an air glow discharge effect.
[0059] In some embodiments, the first inductor and the second power supply are preferably differential mode inductors for more stable voltage delivery.
[0060] like Figure 2 As shown, the control method includes: acquiring the discharge output voltage at the output terminal of the discharge circuit; tracking the resonant frequency on the discharge circuit; determining whether the resonant frequency is stable; if so, adjusting the output voltage of the adjustable power supply according to the discharge output voltage to maintain the high voltage peak of the discharge output voltage within a set range; if not, sending a step-down adjustment signal to the adjustable power supply to reduce the output voltage of the adjustable power supply. By tracking the stability of the resonant frequency, when the resonance is unstable, the output voltage of the adjustable power supply can be lowered to adjust the resonance stability, reducing the impact and loss on the circuit; simultaneously, when the resonance is stable, adjusting the high voltage peak to a higher stable value makes the secondary output voltage of the transformer relatively stable, thereby enabling the load to stably perform air glow discharge and improving the glow discharge effect.
[0061] Some embodiments of this disclosure also provide control devices, power supply systems, and computer-readable storage media corresponding to the control methods described above.
[0062] The air glow discharge power supply circuit control method provided in the above embodiments of this disclosure can adjust the output voltage of the adjustable power supply in a timely manner, thereby reducing the impact and loss on the circuit and protecting the circuit. Furthermore, when the resonance is stable, the peak voltage is obtained by collecting the discharge output voltage of the transformer, thereby adjusting the output voltage of the adjustable power supply to maintain the peak voltage at a high stable value, so as to stably realize air glow discharge and improve the glow discharge effect.
[0063] This disclosure provides at least one embodiment of an air glow discharge power supply circuit control method. This control method can be implemented in software, hardware, firmware, or any combination thereof. It is loaded and executed by a processor in a device such as a mobile phone, tablet computer, laptop computer, desktop computer, or network server, thereby tracking the resonant frequency and the discharge output voltage value, and thus regulating the output voltage of the adjustable power supply. This can both protect the circuit and provide a stable discharge output voltage peak to stably achieve air glow discharge.
[0064] Below, for reference Figure 3 The following describes a method for controlling an air glow discharge power supply circuit according to at least one embodiment of the present disclosure. This power supply control method includes steps S1 to S6.
[0065] S1. Provide an initial voltage adjustment signal to the adjustable power supply, so that the adjustable power supply outputs voltage to the circuit.
[0066] In some embodiments, the initial voltage adjustment signal is a lower initial voltage, which causes the adjustable power supply to output a lower initial voltage to the circuit, thereby ensuring the stable operation of the resonant circuit and the transformer, and avoiding damage or loss to the circuit caused by excessively high initial voltage.
[0067] S2. Obtain the discharge output voltage at the output terminal of the discharge circuit;
[0068] In some embodiments, in step S2, a preset range for maintaining the high voltage peak of the discharge output voltage is set so that during the glow discharge process, the magnitude of the high voltage peak is obtained based on the real-time acquired discharge output voltage, which facilitates the adjustment of the discharge output voltage at the output terminal of the discharge circuit by means of the high voltage peak and the preset range.
[0069] S3, the resonant frequency on the tracking discharge circuit;
[0070] In some embodiments, the resonant frequency on the tracking discharge circuit, such as Figure 4 As shown, it includes:
[0071] S31. Obtain the zero-voltage signal of the transformer primary connected in parallel across the capacitor. It can be understood that the point where the transformer primary is connected in parallel across the capacitor can be the matching network point A and the matching network point B.
[0072] In some embodiments, the signal detection when the voltage at matching network point A and matching network point B returns to zero can be acquired by a first zero-voltage detection circuit and a second zero-voltage detection circuit; the first zero-voltage detection circuit is connected to matching network point A, and the second zero-voltage detection circuit is connected to matching network point B, thereby realizing the acquisition of zero-voltage signals at matching network points A and B respectively.
[0073] S32. Track the resonant frequency based on the zero-voltage signal.
[0074] In some embodiments, the resonant frequency is tracked based on the zero-voltage signal, such as... Figure 5 As shown, it includes:
[0075] S321. Set the upper limit of the tracking count and the duration of the first switch being turned on once before the zero voltage signal is generated, and clear the tracking count; the duration is recorded as T1.
[0076] In some embodiments, the set duration is the duration of the previous cycle when the first switch was turned on and the second switch was turned off, and the current tracking count has been cleared.
[0077] S322. Switch the first switch transistor and the second switch transistor to turn off the first switch transistor and turn on the second switch transistor;
[0078] S323. Track whether the zero voltage signal is generated during the specified duration;
[0079] In some embodiments, before tracking whether the zero voltage signal is generated during the duration, step S4 can be entered to determine whether the resonance is stable. If the resonance is stable, then step S323 can be entered.
[0080] S324. If not, the duration is reached, and the duration is increased by a set unit time (Δt) and updated to T2=T1+Δt, a tracking count is added, and the first switch and the second switch are switched, the second switch is turned off, the first switch is turned on, and the process proceeds to step S4.
[0081] S325. If so, when a zero voltage signal is detected, switch the first switch and the second switch, turn off the second switch and turn on the first switch, update the time elapsed since the zero voltage signal was generated to the duration, denoted as T3, clear the tracking count to zero, and proceed to step S4.
[0082] In some embodiments, when the number of tracking counts is too high, it indicates that the voltage at point A or point B of the matching network takes a long time to return to zero, indicating that the resonant frequency is unstable, and corresponding measures need to be taken in a timely manner. Furthermore, the longer the voltage at point A or point B of the matching network returns to zero, the longer the first or second switching transistor remains in operation, and the more necessary it is to switch the first and second switching transistors in a timely manner to reduce the impact on the circuit and switching losses.
[0083] In some embodiments, such as Figure 6As shown, when the duration of the first switch being turned on before the zero voltage signal is generated is set to T1, the voltage curve at point A of the matching network is the first curve 10. When the tracking reaches the specified duration and the zero voltage signal is generated, the duration of the current zero voltage signal is consistent with T1, and the voltage curve at point A or point B of the matching network (the cases of point A and point B of the matching network are consistent, and point A of the matching network is used for explanation here) is the first curve in the figure. At this time, the tracking count is updated to zero.
[0084] Furthermore, when the zero voltage signal is generated before the tracking reaches the specified duration, the voltage curve at point A of the matching network is the second curve 20. Since the duration of the current zero voltage signal is earlier than T1, soft switching can be implemented at this time, that is, the first switch and the second switch can be switched, and T1 is updated to the duration of the current zero voltage signal, and the tracking count is updated to zero.
[0085] On the other hand, if no zero-voltage signal is generated when the tracking reaches the specified duration, the voltage curve at point A of the matching network is the third curve 30. Since the duration at which the zero-voltage signal is generated at point A of the matching network is later than T1, soft switching cannot be achieved. By increasing T1 by a unit time Δt (i.e., updating the currently set duration to T2 = T1 + Δt) and incrementing the tracking count, the first and second switching transistors are switched via a control signal. After several cycles, when the current switching duration reaches the duration of the third curve at point A of the matching network, a zero-voltage signal is generated, and the tracking count eventually reaches the set limit. This indicates that the instability of the resonant frequency has exceeded the set requirements, thus proceeding to the next step. Clearly, the smaller the difference between the time when the third curve reaches zero voltage and the time when the first curve reaches zero voltage at point A of the matching network, the smaller the frequency change, and the more stable the resonance. Therefore, the tracking count indicates the stability of the resonance. A larger tracking count indicates a larger difference between the time when point A of the matching network reaches zero voltage and the given T1, indicating a larger resonant frequency change and thus poorer resonance stability. By tracking the time it takes for points A and B of the matching network to reach zero voltage, the resonant frequency can be accurately tracked, and the degree of frequency fluctuation can be determined based on the time change, thus facilitating the formulation of corresponding control measures.
[0086] S4. Determine whether the resonant frequency is stable;
[0087] In some embodiments, it is determined whether the resonant frequency is stable, such as... Figure 5 As shown, it includes:
[0088] S41. Determine whether the tracking count has reached the upper limit;
[0089] S42. If the tracking count does not reach the upper limit, the loop continues into step S323, that is, it enters the step of tracking whether the zero voltage signal is generated within the duration.
[0090] S43. If the tracking count reaches the upper limit, the resonant frequency is determined to be unstable.
[0091] S5. If the resonant frequency is stable, adjust the output voltage of the adjustable power supply according to the discharge output voltage so that the high voltage peak of the discharge output voltage is maintained within the set range.
[0092] In some embodiments, the output voltage of the adjustable power supply is adjusted according to the discharge output voltage to maintain the high voltage peak of the discharge output voltage within a set range, such as... Figure 7 As shown, it includes:
[0093] S51. Determine the magnitude of the high voltage peak based on the discharge output voltage;
[0094] S52. Determine whether the high voltage peak value deviates from the set range;
[0095] S53. If the deviation is found, adjust the output voltage of the adjustable power supply to keep the high voltage peak of the discharge output voltage within the set range.
[0096] In some embodiments, step S53 includes: reducing the output voltage of the adjustable power supply when the high voltage peak is higher than the set range; and increasing the output voltage of the adjustable power supply when the high voltage peak is lower than the set range.
[0097] Furthermore, by determining the range within which the current high voltage peak value falls, the appropriate value for adjusting the discharge output voltage can be determined. The high voltage peak value formed on the transformer secondary can be changed by adjusting the output voltage of the adjustable power supply. Therefore, by maintaining the high voltage peak value of the transformer secondary within a stable range and ensuring a stable resonant frequency, the air glow discharge effect can be improved.
[0098] S6. If the resonant frequency is unstable, a step-down adjustment signal is sent to the adjustable power supply to reduce the output voltage of the adjustable power supply.
[0099] In some embodiments, when the resonant frequency is unstable, the number of unit time units between the time it takes for the current matching network point A or B to reach zero voltage and the set time can be determined based on the tracking count, thereby judging the voltage drop of the adjustable power supply and implementing corresponding countermeasures. For example, if the frequency when the resonance is stable is 500Hz, and the set frequency change per unit time is 100Hz (the specific value can be determined according to the actual situation, and is not limited to 100Hz), then the set tracking count generally does not exceed 5, and the upper limit of the tracking count is set to 10. When the tracking count reaches the upper limit, it indicates that the frequency fluctuation has exceeded 1kHz, indicating that the frequency has fluctuated severely, and it is judged as resonant instability. Thus, the resonant frequency fluctuation value can be obtained, making it convenient to implement corresponding countermeasures.
[0100] In some embodiments, reducing the output voltage of the adjustable power supply can reduce the voltage of the resonant circuit, allowing the first and second switching transistors to be soft-switched, reducing the impact and losses on the circuit. Furthermore, adjusting the duration of the first or second switching transistor when the matching network point A or matching network point B reaches zero voltage can stabilize the resonant frequency, prevent excessive load fluctuations, and improve the stability and effectiveness of air glow discharge.
[0101] The air glow discharge power supply circuit control method provided in the embodiments of this disclosure can adjust the output voltage of the adjustable power supply in a timely manner, thereby reducing the impact and loss on the circuit and protecting the circuit. Furthermore, when the resonance is stable, the peak voltage is obtained by collecting the discharge output voltage of the transformer, thereby adjusting the output voltage of the adjustable power supply to maintain the peak voltage at a high stable value, so as to stably realize air glow discharge and improve the glow discharge effect.
[0102] At least some embodiments of this disclosure also provide a power supply system for air glow discharge, such as Figure 1 As shown, it includes:
[0103] The power supply circuit includes an adjustable voltage power supply and a discharge circuit connected to the output terminal of the adjustable voltage power supply; the discharge circuit is used to convert DC input into AC and boost the voltage to cause air glow discharge in the load.
[0104] The control circuit is connected to the power supply circuit, and the control circuit includes:
[0105] The acquisition circuit connected to the discharge circuit is used to detect the output voltage of the discharge circuit and the resonant frequency of the circuit.
[0106] The controller is connected to the input terminal of the acquisition circuit, and the output terminal of the controller is connected to the adjustable voltage power supply for executing the power circuit control method provided in any embodiment of this disclosure.
[0107] In some embodiments, the discharge circuit includes a resonant circuit and a transformer; the resonant circuit includes a first inductor, a second inductor, and a capacitor. The first and second inductors are coupled, meaning their input terminals are both connected to the output terminal of the adjustable voltage. The output terminal of the first inductor is connected to the first terminal of the capacitor and is grounded through a first switching transistor. The output terminal of the second inductor is connected to the second terminal of the capacitor and is grounded through a second switching transistor. The first and second switching transistors operate in a push-pull configuration to generate an alternating current across the capacitor. The primary winding of the transformer is connected in parallel with the capacitor, and the secondary winding is connected to the load.
[0108] In some embodiments, the end of the first switching transistor away from the output terminal of the first inductor is grounded, and the end connected to the output terminal of the first inductor is connected to one end of the capacitor, and this is recorded as point A of the matching network; the end of the second switching transistor away from the output terminal of the second inductor is grounded, and the end connected to the output terminal of the second inductor is connected to one end of the capacitor, and this is recorded as point B of the matching network. The primary winding of the transformer is connected to matching network points A and B respectively, thus achieving parallel connection with the capacitor. When the first switching transistor is turned on to ground and the second switching transistor is turned off, the output voltage of the adjustable power supply charges the first inductor, and the energy of the second inductor enters the transformer and capacitor via matching network point B as current; when the second switching transistor is turned on to ground and the first switching transistor is turned off, the output voltage of the adjustable power supply charges the second inductor, and the energy of the first inductor enters the transformer and capacitor via matching network point A as current. By alternately switching the first and second switching transistors, an alternating current is formed at the primary winding of the transformer. After being stepped up and amplified by the transformer, an alternating high voltage is formed at the secondary winding of the transformer, causing the load to produce an air glow discharge effect.
[0109] In some embodiments, the acquisition circuit includes a discharge output voltage acquisition circuit, a first zero-voltage signal acquisition circuit, and a second zero-voltage signal acquisition circuit; wherein, one end of the discharge output voltage acquisition circuit is connected to the secondary output terminal of the transformer, and the other end is connected to the controller to acquire the discharge output voltage of the discharge circuit and send it to the controller; one end of the first zero-voltage signal acquisition circuit is connected to point A of the matching network, and the other end is connected to the controller to acquire the zero-voltage signal of point A of the matching network; one end of the second zero-voltage signal acquisition circuit is connected to point B of the matching network, and the other end is connected to the controller to acquire the zero-voltage signal of point B of the matching network, thereby tracking the resonant frequency based on the zero-voltage signal.
[0110] At least some embodiments of this disclosure also provide a power circuit control device for air glow discharge, such as Figure 8As shown, the power circuit control device includes a memory 21 and a processor 22. The memory 21 stores a computer program, which, when executed by the processor, performs a power circuit control method as described in any embodiment of this disclosure.
[0111] In some embodiments, processor 22 is used to perform all or part of the steps in the power circuit control method as described in any embodiment of this disclosure. Memory 21 is used to store various types of data, which may include, for example, instructions for any application or method in an electronic device, as well as application-related data.
[0112] The processor 22 may be implemented as an Application Specific Integrated Circuit (ASIC), Digital Signal Processor (DSP), Digital Signal Processing Device (DSPD), Programmable Logic Device (PLD), Field Programmable Gate Array (FPGA), controller, microcontroller, microprocessor, or other electronic components, and is used to execute the application management method in Embodiment 1 above.
[0113] The memory 21 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (PR(M), Erasable Programmable Read-Only Memory (PR(M), Programmable Read-Only Memory (PR(M), Read-Only Memory (R(M)), Magnetic Storage, Flash Memory, Disk, or Optical Disk.
[0114] At least some embodiments of this disclosure also provide a computer-readable storage medium, such as Figure 9 As shown, the readable storage medium stores a computer program 31, which, when executed by a processor, implements the steps of the power circuit control method provided in any embodiment of this disclosure.
[0115] In some embodiments, the storage medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. Machine-readable media may include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (R(M), erasable programmable read-only memory (PR(M) or flash memory), optical fiber, portable compact disc read-only memory (CD-R(M), optical storage devices, magnetic storage devices, or any suitable combination thereof.
[0116] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device for displaying information to the user (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor); and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the computer. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).
[0117] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as a data server), or computing systems that include middleware components (e.g., an application server), or computing systems that include frontend components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with embodiments of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., a communication network). Examples of communication networks include local area networks (LANs), wide area networks (WANs), and the Internet.
[0118] Computer systems can include clients and servers. Clients and servers are generally located far apart and typically interact via communication networks. Client-server relationships are created by computer programs running on the respective computers and having a client-server relationship with each other. Servers can be cloud servers, servers in distributed systems, or servers incorporating blockchain technology.
[0119] In summary, this application provides a method, system, device, and storage medium for controlling an air glow discharge power supply circuit. This power supply circuit control method enables timely adjustment of the output voltage of the adjustable power supply, thereby reducing impact and losses on the circuit and protecting it. Furthermore, at the point of resonance stability, the peak voltage is obtained by acquiring the discharge output voltage of the transformer, and the output voltage of the adjustable power supply is adjusted to maintain the peak voltage at a relatively high and stable value, thus stably achieving air glow discharge and improving the glow discharge effect.
[0120] The various embodiments in this disclosure are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.
[0121] The scope of protection of this disclosure is not limited to the embodiments described above. Obviously, those skilled in the art can make various modifications and variations to this disclosure without departing from its scope and spirit. If such modifications and variations fall within the scope of the claims of this disclosure and their equivalents, then the intent of this disclosure also includes such modifications and variations.
Claims
1. A method of controlling an air glow discharge power supply circuit, characterized by, The power supply circuit includes: Adjustable power supply; discharge circuit connected to the output terminal of the adjustable power supply; the discharge circuit is used to convert DC input to AC and boost the voltage to cause air glow discharge in the load; The control method includes: Obtain the discharge output voltage at the output terminal of the discharge circuit; Track the resonant frequency on the discharge circuit; Determine whether the resonant frequency is stable; If so, adjust the output voltage of the adjustable power supply according to the discharge output voltage so that the high voltage peak of the discharge output voltage is maintained within the set range; If not, a buck adjustment signal is sent to the adjustable power supply to reduce the output voltage of the adjustable power supply; The discharge circuit includes a resonant circuit and a transformer; the resonant circuit includes a first inductor, a second inductor, and a capacitor; the input terminals of the first inductor and the second inductor are both connected to the output terminal of the adjustable voltage; the output terminal of the first inductor is connected to the first terminal of the capacitor, and the output terminal of the first inductor is grounded through a first switching transistor; the output terminal of the second inductor is connected to the second terminal of the capacitor, and the output terminal of the second inductor is grounded through a second switching transistor; the first and second switching transistors operate in a push-pull manner to generate an alternating current in the capacitor; the primary winding of the transformer is connected in parallel with the capacitor, and the secondary winding is connected to the load.
2. The method of claim 1, wherein the method further comprises: The resonant frequencies on the tracking discharge circuit include: Obtain the zero-voltage signal of the transformer primary connected in parallel across the capacitor; The resonant frequency is traced based on the zero-voltage signal.
3. The method of claim 2, wherein the method further comprises: The step of tracking the resonant frequency based on the zero-voltage signal includes: Set the upper limit of the tracking count and the duration of a single conduction of the first or second switching transistor before the zero voltage signal is generated, and clear the tracking count; Switch the first switching transistor to the second switching transistor; Track whether the zero voltage signal is generated during the specified duration; If not, increase the duration by a set unit of time and update, and increase the tracking count; switch the first switch and the second switch.
4. The method of claim 3, wherein the method further comprises: If the zero voltage signal is generated within the specified tracking time, the first switch and the second switch are switched, the time when the zero voltage signal is generated is updated to the new duration, and the tracking count is cleared.
5. The air glow discharge power supply circuit control method according to claim 3, characterized in that, The determination of whether the resonant frequency is stable includes: Determine whether the tracking count has reached its upper limit; If not, the process loops back to step 2, tracking whether the zero-voltage signal is generated within the specified duration. If so, then the resonant frequency is determined to be unstable.
6. The air glow discharge power supply circuit control method according to claim 1, characterized in that, The step of adjusting the output voltage of the adjustable power supply according to the discharge output voltage to maintain the high voltage peak of the discharge output voltage within a set range includes: The magnitude of the high voltage peak is determined based on the discharge output voltage. Determine if the high-voltage peak value deviates from the set range; If the voltage deviates, adjust the output voltage of the adjustable power supply to keep the high voltage peak of the discharge output voltage within the set range.
7. A power supply system for air glow discharge, characterized in that, include: A power supply circuit, which includes an adjustable power supply and a discharge circuit connected to the output terminal of the adjustable power supply. The discharge circuit converts DC input to AC and boosts the voltage to induce air glow discharge in the load. The discharge circuit includes a resonant circuit and a transformer. The resonant circuit includes a first inductor, a second inductor, and a capacitor. The input terminals of both the first and second inductors are connected to the output terminal of an adjustable voltage source. The output terminal of the first inductor is connected to the first terminal of the capacitor and is grounded through a first switching transistor. The output terminal of the second inductor is connected to the second terminal of the capacitor and is grounded through a second switching transistor. The first and second switching transistors operate in a push-pull configuration to generate an alternating current in the capacitor. The primary winding of the transformer is connected in parallel with the capacitor, and the secondary winding is connected to the load. A control circuit connected to a power supply circuit, the control circuit comprising: The acquisition circuit connected to the discharge circuit is used to detect the output voltage of the discharge circuit and the resonant frequency of the circuit. The controller is connected to the input terminal of the acquisition circuit, and the output terminal of the controller is connected to the adjustable voltage power supply for executing the power circuit control method according to any one of claims 1-6.
8. A power supply circuit control device for air glow discharge, characterized in that, It includes a memory and a processor, wherein the memory stores a computer program that, when executed by the processor, performs the power circuit control method as described in any one of claims 1-6.
9. A computer-readable storage medium storing a program executable by a processor, characterized in that, The program that the processor can execute is used, when executed by the processor, to perform the method as described in any one of claims 1-6.